The CWA100 upgraded supercharge coolant pump thread...everything CWA100...

[gsxr_wrx]

I purchased and installed the CWA100 with the Tecomotive harness. The pump appears to be working,the hoses felt like fluid was moving through them and the pump was warm and the pump is silent,however I’m getting a P190C00 soft code. I am 100% sure all my wires are intact (did not do pump mod)

[JoedreddUK]

Can someone explain how this improves the cooling effect. As far as I can see you’re moving the hot water through the system quicker but surely it’s not getting enough contact time with the SC cooler/ incoming air or am I looking at it wrong???

[tmoe]

Simple cwa50 to cwa100-3 compare.

There is a couple of degree C decrease in IAT temp rise based on the conditions I tested in.

Tested with: Q5, 3.0 ZF 8HP trans, APR V4 100 octane OEM HE & AWE reservoir/divorced , PR 3.27. I used to run a PR 3.1 and stock 6300 rpm shift point and with that config my minimal setup actually worked really well: IAT 65C @85F with E25 no timing pull or bypass opening. When I changed from a 179 to 189 crank pulley w/E35 and used HP Tuners MVPI2 editor to change shift points to 7000 rpm, no surprise - my IAT's were no longer ok. This configuration should provide a good test case as my HE does not represent optimal cooling so if coolant flow is a limiting factor this should show it.

I logged using HP Tuners scanner tool, which provides a GUI to review data down to the .1 second across all channels logged, I don't use VCDS anymore.

Track Results
CWA50

Outside temp 74F DA 2148

0 mph IAT start 110F 43C

End
115 mph IAT end 166F 74C

Temp Rise in 31C

CWA100-3

Outside temp 77F DA 2572
0 mph IAT start 113F 45C

End
115 mph IAT end 72C

Temp Rise 27C or a 4C reduction in temp rise.

While these results are not earth shattering the CWA100 did reduce temp rise, my assumption is the impact "could" be larger with a Killer Chiller or Performance HE. I would also note, as has been previously reported, highway cruising temps also come down to 7 or so degree C over ambient, this is probably one of the best part of the pump, keeps the engine ready for those short term boost needs.

The Tecomotive kit is completely plug and play:
https://tecomotive.com/store/en/bund...-3-adapter-kit

Hardest part of installing the kit was the hidden nut inside the pump mounting cage, that could be my 2013 Q design but that wasn't fun.

[bhvrdr]

Simple cwa50 to cwa100-3 compare.

There is a couple of degree C decrease in IAT temp rise based on the conditions I tested in.

Tested with: Q5, 3.0 ZF 8HP trans, APR V4 100 octane OEM HE & AWE reservoir/divorced , PR 3.27. I used to run a PR 3.1 and stock 6300 rpm shift point and with that config my minimal setup actually worked really well: IAT 65C @85F with E25 no timing pull or bypass opening. When I changed from a 179 to 189 crank pulley w/E35 and used HP Tuners MVPI2 editor to change shift points to 7000 rpm, no surprise - my IAT's were no longer ok. This configuration should provide a good test case as my HE does not represent optimal cooling so if coolant flow is a limiting factor this should show it.

I logged using HP Tuners scanner tool, which provides a GUI to review data down to the .1 second across all channels logged, I don't use VCDS anymore.

Track Results
CWA50

Outside temp 74F DA 2148

0 mph IAT start 110F 43C

End
115 mph IAT end 166F 74C

Temp Rise in 31C

CWA100-3

Outside temp 77F DA 2572
0 mph IAT start 113F 45C

End
115 mph IAT end 72C

Temp Rise 27C or a 4C reduction in temp rise.

While these results are not earth shattering the CWA100 did reduce temp rise, my assumption is the impact "could" be larger with a Killer Chiller or Performance HE. I would also note, as has been previously reported, highway cruising temps also come down to 7 or so degree C over ambient, this is probably one of the best part of the pump, keeps the engine ready for those short term boost needs.

The Tecomotive kit is completely plug and play:
https://tecomotive.com/store/en/bund...-3-adapter-kit

Hardest part of installing the kit was the hidden nut inside the pump mounting cage, that could be my 2013 Q design but that wasn't fun.

Nice work! thats roughly what ive seen. I generally tell people its worth a couple degrees C but sometimes that couple degrees can make all the difference with the way timing reduction tables interact with IAT.

Mike

[JoedreddUK]

Simple cwa50 to cwa100-3 compare.

There is a couple of degree C decrease in IAT temp rise based on the conditions I tested in.

Tested with: Q5, 3.0 ZF 8HP trans, APR V4 100 octane OEM HE & AWE reservoir/divorced , PR 3.27. I used to run a PR 3.1 and stock 6300 rpm shift point and with that config my minimal setup actually worked really well: IAT 65C @85F with E25 no timing pull or bypass opening. When I changed from a 179 to 189 crank pulley w/E35 and used HP Tuners MVPI2 editor to change shift points to 7000 rpm, no surprise - my IAT's were no longer ok. This configuration should provide a good test case as my HE does not represent optimal cooling so if coolant flow is a limiting factor this should show it.

I logged using HP Tuners scanner tool, which provides a GUI to review data down to the .1 second across all channels logged, I don't use VCDS anymore.

Track Results
CWA50

Outside temp 74F DA 2148

0 mph IAT start 110F 43C

End
115 mph IAT end 166F 74C

Temp Rise in 31C

CWA100-3

Outside temp 77F DA 2572
0 mph IAT start 113F 45C

End
115 mph IAT end 72C

Temp Rise 27C or a 4C reduction in temp rise.

While these results are not earth shattering the CWA100 did reduce temp rise, my assumption is the impact "could" be larger with a Killer Chiller or Performance HE. I would also note, as has been previously reported, highway cruising temps also come down to 7 or so degree C over ambient, this is probably one of the best part of the pump, keeps the engine ready for those short term boost needs.

The Tecomotive kit is completely plug and play:
https://tecomotive.com/store/en/bund...-3-adapter-kit

Hardest part of installing the kit was the hidden nut inside the pump mounting cage, that could be my 2013 Q design but that wasn't fun.

Interesting read and nice results. Is that with stock cooling?

[tmoe]

Interesting read and nice results. Is that with stock cooling?

Yes that's with the OEM HE, divorced and AWE reservoir.

[JoedreddUK]

Yes that's with the OEM HE, divorced and AWE reservoir.

Worth bearing in mind when I get my DP installed. Mind you it’s not very often the UK gets as hot as you guys in the US lol

[LilRobb]

Harnesses for each of these pumps?

You can easily make a harness for each of these pumps.

Here are the part numbers needed for the CWA100-2

Connector to the CWA10-2 Pump: BMW part number: 12527549033 (available at ecstuning or fcp for under $5)
Connector to the stock harness: TE Connectivity p/n 1-1703494-1 (available on arrow.com for $1.69)






CWA100-2

First of all THANKS for this writeup.

Now here I am with my super limited knowledge (but high eagerness) on wiring and stuff...

Sourced a Mercedes 100-2 pump already.
But now the wiring...

Ordered also the TE-connectivity plug, and what I think is the right terminals and waterplugs.
Any chance someone with more knowledge than me can confirm the part numbers for those?

Now the BMW plug - can't seem to find out what terminals I will need to put in there, assuming it isn't coming already with terminals and waterplugs?

Lastly - since I am coming from 3 wires, but gonna need 4 for the BMW plug - can I simply splice the ground wire into two strands and use the same ground on the 3 plug?

Any help is appreciated guys!

[TC_S4]

Attachment 131036

What’s this part called & what’s for?

[bajan01]

Attachment 131036

What’s this part called & what’s for?

It’s one of the two factory heat-exchangers (intercooler) on the supercharger loop. It usually stays in the loop when the front one is upgraded.

[TC_S4]

It’s one of the two factory heat-exchangers (intercooler) on the supercharger loop. It usually stays in the loop when the front one is upgraded.

I don’t recall seeing that on my B8.5.
The second factory Hx, is only on B8 model?

[bhvrdr]

I don’t recall seeing that on my B8.5.
The second factory Hx, is only on B8 model?

Correct.

[TC_S4]

Correct.

🤔So the b8 has better and bigger coolant capacity then the B8.5?

[bhvrdr]

So the b8 has better and bigger coolant capacity then the B8.5?

Check it...

https://www.audizine.com/forum/showt...hanger-upgrade

I ended up with triples on my last s5

[TC_S4]

Check it...

https://www.audizine.com/forum/showt...hanger-upgrade

I ended up with triples on my last s5

Wow, that’s crazy/awesome. Did, you do all 3 in one shot or you stack one at a time? It’s will be interesting to compare the IAT on each HX added.

[Bartlett]

If my IATs are fine except for during WOT, but they used to be fine during WOT, and I have gotten a code for water pump malfunction, is it safe to assume my pump is going bad? I have a CWA-100 on standby.

[LilRobb]

Can anyone here decipher the wiring diagram for the Mercedes pump?
How do I wire a 3 connector unit into 4 wires?

[gsxr_wrx]

What code are you throwing?
I had P190 and thought my pump going bad too. I swapped it to a CWA100 and everything is still the same

[Bartlett]

What code are you throwing?
I had P190 and thought my pump going bad too. I swapped it to a CWA100 and everything is still the same

Hmmm, looks like we have the same codes. I had:

8900 - Coolant Pump for Intercooler
P190D 00 [032] - Mechanical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear

It popped up several times over the course of 2 weeks, but has yet to re-appear. It's been about 3 weeks code-free.

All I know is that my IATs get way too high, way too quickly. Same thing with my engine oil temp. This never used to happen.

So if it's not the pump, then I'll be confused. But, maybe it's the thermostat.

[gsxr_wrx]

My IAT’s were fine. But I still have the code. I never figured it out. From what I’ve read and been told,you usually get this code when the signal wire has been cut to run it at 100%

[byront8]

Just picked one of these up and will mate it to my Merc Racing HX - what’s the typical IAT drop with this setup? (If anyone else has the same).

This will be what I use for my cooling even at Throttle Body levels, as I really only use it for road use.


Sent from my iPhone using Audizine

[Bartlett]

My IAT’s were fine. But I still have the code. I never figured it out. From what I’ve read and been told,you usually get this code when the signal wire has been cut to run it at 100%

Hmm, didn't know that was the case. Mine definitely wasn't cut or tampered with, so it can't be that lol Perhaps there is some electrical issue though.

---

Also, how long does it take to swap the coolant pumps?

[gsxr_wrx]

Mine wasn’t cut either.

And about 2hrs

[Jflow23]

Hmmm, looks like we have the same codes. I had:

8900 - Coolant Pump for Intercooler
P190D 00 [032] - Mechanical Malfunction
Intermittent - Not Confirmed - Tested Since Memory Clear

It popped up several times over the course of 2 weeks, but has yet to re-appear. It's been about 3 weeks code-free.

All I know is that my IATs get way too high, way too quickly. Same thing with my engine oil temp. This never used to happen.

So if it's not the pump, then I'll be confused. But, maybe it's the thermostat.

Your code, P190D means your pump has failed or is blocked.

The pump mod code is:
7814 - Coolant Pump for Intercooler
P190C 00 [039] - No Signal

[Bartlett]

Mine wasn’t cut either.

And about 2hrs

Cool, that's about what I was hoping. Thanks!

Your code, P190D means your pump has failed or is blocked.

The pump mod code is:
7814 - Coolant Pump for Intercooler
P190C 00 [039] - No Signal

Ah, thanks for clarifying!

[nick0188]

So I've had this pump for a while, and do not have the pump mod (well it's on a switch, but currently and usually connected in the OEM way). I have this code:
7814 - Coolant Pump for Intercooler
P190C 00 [044] - No Signal

I can watch the frequency counter increase as the car sits an idles. Has anyone else had this code with this pump hooked up the OEM way? For what it's worth the pump is definitely working, seeing ~20-30F over ambient while cruising and the temps drop back down rapidly after a pull.

This is what I see looking at measuring values also:

[gsxr_wrx]

I have the exact same readings as you with the CWA-100. I believe it’s normal

[gsxr_wrx]

[Waffles_s4]

Hi, I have a couple of questions

1) did anyone run the oem pump at full speed 100% of the time? How did the pump hold up?

2) what's so far the cheapest way to get the cwa100-3 or cwa100-2?

Sent from my SM-G935W8 using Audizine mobile app

[gsxr_wrx]

Didn’t run at 100%
Cheapest way is straight from the company in Germany

[Waffles_s4]

well Tecomotive is crazy to sell these at $250 EUROS! Thats like $270 USD... for a small pump.

[bhvrdr]

well Tecomotive is crazy to sell these at $250 EUROS! Thats like $270 USD... for a small pump.

Well you can always get it for 10% off msrp from ecstuning and then source the harness yourself...

https://www.ecstuning.com/b-genuine-...ump/4n0965567/

:p


They do come up used every once in awhile on ebay for $100.

[Waffles_s4]

Wel thats why am asking if we can run the stock pump 100% all the time, because we can find those cheaper, and if they run 2-3 years at 100% duty cycle then it would make more sense

[LilRobb]

Wel thats why am asking if we can run the stock pump 100% all the time, because we can find those cheaper, and if they run 2-3 years at 100% duty cycle then it would make more sense

That's an F in thermodynamics...

Pumping longer continuously is not the same as pumping more volume, quicker.

[bhvrdr]

Wel thats why am asking if we can run the stock pump 100% all the time, because we can find those cheaper, and if they run 2-3 years at 100% duty cycle then it would make more sense

I run the cwa100 at 100%

[Phil.Lmbrt]

So I've had this pump for a while, and do not have the pump mod (well it's on a switch, but currently and usually connected in the OEM way). I have this code:
7814 - Coolant Pump for Intercooler
P190C 00 [044] - No Signal

I can watch the frequency counter increase as the car sits an idles. Has anyone else had this code with this pump hooked up the OEM way? For what it's worth the pump is definitely working, seeing ~20-30F over ambient while cruising and the temps drop back down rapidly after a pull.

This is what I see looking at measuring values also:

that code is from your switch for the pump mod.. 100% normal

[Waffles_s4]

I run the cwa100 at 100%

How long u been doing that for, since u installed the pump?

Do u think if I run the OEM pup 100% all the time it would last 2-3 years?

[Waffles_s4]

That's an F in thermodynamics...

Pumping longer continuously is not the same as pumping more volume, quicker.

lol. OEM pump actually runs at 50% of its max RPM, even under full boost or at redline. It only runs 100% if the ECU decides to run it under emergency mode, at which point it will send a signal to the pump to run 100% duty cycle. So if I pump twice as fast as the normal mode, I moving coolant at a much faster rate between the SC and the HX. Now I want my A back.

[bhvrdr]

How long u been doing that for, since u installed the pump?

Do u think if I run the OEM pup 100% all the time it would last 2-3 years?

Ive run the oem pump at 100% on three cars. Never had an issue but cant say if you will. The whole point of the cw100 though is that it provides more flow than the cw50.

Mike

[LilRobb]

lol. OEM pump actually runs at 50% of its max RPM, even under full boost or at redline. It only runs 100% if the ECU decides to run it under emergency mode, at which point it will send a signal to the pump to run 100% duty cycle. So if I pump twice as fast as the normal mode, I moving coolant at a much faster rate between the SC and the HX. Now I want my A back.

You missed my point - you're correct comparing a CWA50 to itself in emergency mode, a CWA100 in regular PWM mode still outflows the CWA50 in emergency mode.